update syntastic, removed unused colors

bundle/git_syntastic/doc/syntastic.txt

@@ -355,7 +355,7 @@ The latest dev versions are on github
 ==============================================================================
 7. Changelog                                             *syntastic-changelog*
 
-next
+2.3.0
     - Add syntastic_loc_list_height option
     - Allow errors to have a "subtype" that is signed differently to standard
       errors. Currently geared towards differentiating style errors from
@@ -365,9 +365,11 @@ next
         - haxe (davidB)
         - ocaml (edwintorok)
         - pylint (parantapa)
+        - rust (cjab)
 
     - Updates to existing checkers:
         - jslint
+        - jshint (gillesruppert)
         - fortran (bmattern)
         - sass
         - html (darcyparker)
@@ -378,10 +380,10 @@ next
         - less (irrationalfab)
         - php (AD7six, technosophos)
         - cuda
-        - python (mitchellh)
+        - python (mitchellh, pneff)
         - perl (Anthony Carapetis)
         - c (naoina, zsprackett)
-        - puppet
+        - puppet (frimik)
 
 2.2.0
     - only do syntax checks when files are saved (not when first opened) - add
@@ -495,6 +497,9 @@ next
 Thanks to the following people for testing, bug reports, patches etc. They own,
 hard.
 
+    Mikael Fridh (frimik)
+    Patrice Neff (pneff )
+    Gilles Ruppert (gillesruppert)
     Naoya INADA (naoina)
     Mitchell Hashimoto (mitchellh)
     irrationalfab